RFE: update |+feature-list| to mark features no longer supported

[Tony Mechelynck]

Some features, which are no longer supported, are listed under
|+feature-list| as if they were: for instance +farsi is listed as B
and +tag_old_static is listed as N. I suggest adding an additional
symbol in the left margin for "never (no longer supported)" (I propose
a dash, which would rank after H [i.e. "this feature is not even
included in Huge builds"] in the legend at lines 305sqq of
doc/various.txt).

Best regards,
Tony.

[Bram Moolenaar]

OK, I marked four features as always disabled:

- *+farsi* |farsi| language
- *+sun_workshop* |workshop|; no longer supported
- *+tag_old_static* old method for static tags |tag-old-static|
- *+tag_any_white* Removed; was to allow any white space in tags files

There probably are a few more.

--
You're as much use as a condom machine at the Vatican.
-- Rimmer to Holly in Red Dwarf 'Queeg'

/// Bram Moolenaar -- Br...@Moolenaar.net -- http://www.Moolenaar.net \\\
/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\ an exciting new programming language -- http://www.Zimbu.org ///
\\\ help me help AIDS victims -- http://ICCF-Holland.org ///